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Zoological Studies

Table 2 Measurements and pt values of selected morphological structures of Milnesium beatae sp. nov. mounted in Hoyer's medium

From: The genus Milnesium Doyère, 1840 (Tardigrada) in South America with descriptions of two new species from Argentina and discussion of the feeding behaviour in the family Milnesiidae

Character N Range Mean SD Holotype
μm pt μm pt μm pt μm pt
Body length 7 662 - 1,011 1,259 - 1,524 864 1,401 144 97 979 1,494
Peribuccal papillae length 7 9.8 - 13.2 18.0 - 23.6 12.0 19.7 1.1 1.9 13.2 20.2
Lateral papillae length 6 10.0 - 14.8 19.0 - 21.1 12.8 20.2 1.6 0.9 13.2 20.2
Buccal tube              
Length 7 51.6 - 70.2   -   61.4 - 6.8 - 65.5 -
Stylet support insertion point 7 33.8 - 45.0 63.8 - 66.7 40.0 65.1 4.3 1.1 43.3 66.1
Anterior width 7 37.0 - 53.5 70.3 - 78.9 45.7 74.3 6.6 3.7 51.7 78.9
Standard width 7 32.0 - 42.5 58.1 - 65.6 38.0 61.9 4.2 2.6 39.2 59.8
Posterior width 7 25.7 - 39.0 49.4 - 56.5 33.1 53.6 5.2 2.8 37.0 56.5
Standard width/length ratio 7 58% - 66%   -   62% - 3% - 60% -
Posterior/anterior width ratio 7 69% - 76%   -   72% - 3% - 72% -
Claw 1 lengths              
External primary branch 7 17.9 - 26.4 33.6 - 41.4 22.0 35.8 3.1 2.7 22.0 33.6
External base + secondary branch 6 13.6 - 22.1 26.4 - 34.6 19.0 30.9 3.8 3.0 20.8 31.8
External spur 4 5.0 - 6.5 8.0 - 10.3 5.6 9.2 0.7 1.0 5.8 8.9
Internal primary branch 6 16.4 - 25.4 31.2 - 39.8 22.0 34.9 3.2 3.0 23.6 36.0
Internal base + secondary branch 6 13.9 - 22.3 26.9 - 33.4 19.1 30.9 3.8 3.0 21.5 32.8
Internal spur 5 4.4 - 7.4 8.5 - 10.5 5.8 9.5 1.2 0.8 ? ?
Claw 2 lengths              
External primary branch 7 19.1 - 27.3 36.9 - 42.4 24.5 39.8 3.6 2.3 27.3 41.7
External base + secondary branch 6 14.8 - 22.9 28.7 - 34.1 19.4 31.6 3.4 2.1 21.1 32.2
External spur 5 5.5 - 7.9 8.0 - 12.1 6.3 10.5 1.1 1.5 7.9 12.1
Internal primary branch 6 18.6 - 25.4 35.4 - 37.4 22.2 36.3 2.9 0.7 24.5 37.4
Internal base + secondary branch 7 14.4 - 21.8 27.9 - 33.3 19.1 31.0 3.1 2.2 21.8 33.3
Internal spur 6 5.2 - 7.7 10.1 - 12.3 6.5 10.6 1.1 0.9 6.8 10.4
Claw 3 lengths              
External primary branch 7 18.4 - 26.7 35.7 - 41.4 23.8 38.7 3.5 2.6 26.7 40.8
External base + secondary branch 6 14.8 - 22.9 28.7 - 36.5 19.8 32.5 3.6 3.0 ? ?
External spur 5 4.7 - 6.9 8.9 - 10.5 5.9 9.7 1.1 0.7 ? ?
Internal primary branch 5 17.6 - 26.4 34.1 - 41.2 22.9 37.8 4.4 3.2 ? ?
Internal base + secondary branch 6 15.5 - 23.1 29.8 - 36.8 20.0 32.6 3.4 2.7 21.7 33.1
Internal spur 5 5.8 - 8.9 10.5 - 14.2 7.3 11.9 1.1 1.4 6.9 10.5
Claw 4 lengths              
Anterior primary branch 6 23.5 - 31.5 43.1 - 49.4 28.7 45.6 2.9 2.5 28.2 43.1
Anterior base + secondary branch 6 17.7 - 25.5 33.4 - 40.0 22.9 36.4 2.8 3.2 21.9 33.4
Anterior spur 5 6.4 - 10.0 12.2 - 14.2 8.2 13.0 1.3 0.8 ? ?
Posterior primary branch 6 24.0 - 32.6 45.3 - 51.5 30.0 47.5 3.4 2.5 32.6 49.8
Posterior base + secondary branch 6 18.2 - 26.1 34.6 - 40.8 24.0 37.9 2.9 2.2 24.1 36..8
Posterior spur 5 6.2 - 8.3 11.2 - 11.8 7.2 11.5 0.8 0.3 ? ?
  1. Range refers to the smallest and the largest structure among all measured specimens.
  2. The pt values are provided in italics.
  3. N, number of specimens/structures measured; SD, standard deviation; ?, no data.
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